ALKALI-FREE ULTRAFINE GLASS FIBER FORMULA

Abstract

An alkali-free ultrafine glass fiber formula includes the following components, in mass percentage calculated based on 100 Kg: SiO2: 50% to 65%, Al.sub.2O.sub.3: 10% to 16.5%, CaO: 17% to 28%, MgO: 0.2% to 4.0%, Na.sub.2O and K.sub.2O: 0.1% to 0.8% in total, CeO.sub.2: 0.1% to 0.5%, Li.sub.2O: 0.1% to 0.7%, Fe.sub.2O.sub.3: 0.05% to 0.6%, TiO.sub.2: 0.1% to 1%, and impurities: the balance. In the preparation of alkali-free ultrafine glass fibers, no fluorine and boron-containing raw materials are used, and CeO.sub.2 and Li.sub.2O are introduced, which avoids the use of B.sub.2O.sub.3 and F that have a large impact on the environment, and reduces environmental pollution. A single fiber strength of prepared glass fibers is about 9% higher than that of the traditional E glass fibers, and the comprehensive performance of a prepared glass fiber product is significantly superior than that of the existing E glass fiber product.

Claims

1. An alkali-free ultrafine glass fiber formula, comprising the following components, in mass percentage calculated based on 100 kg: SiO.sub.2: 50% to 65%, Al.sub.2O.sub.3: 10% to 16.5%, CaO: 17% to 28%, MgO: 0.2% to 4.0%, Na.sub.2O and K.sub.2O: 0.1% to 0.8% in total, CeO.sub.2: 0.1% to 0.5%, Li.sub.2O: 0.1% to 0.7%, Fe.sub.2O.sub.3: 0.05% to 0.6%, TiO.sub.2: 0.1% to 1%, and impurities: the balance.

2. The alkali-free ultrafine glass fiber formula according to claim 1, comprising the following components, in mass percentage calculated based on 100 kg: SiO.sub.2: 50% to 62%, Al.sub.2O.sub.3: 12% to 16.5%, CaO: 19% to 25%, MgO: 0.2% to 2.0%, Na.sub.2O and K.sub.2O: 0.1% to 0.8% in total, CeO.sub.2: 0.1% to 0.5%, Li.sub.2O: 0.1% to 0.7%, Fe.sub.2O.sub.3: 0.05% to 0.45%, TiO.sub.2: 0.1% to 1%, and impurities: the balance.

3. The alkali-free ultrafine glass fiber formula according to claim 1, comprising the following components, in mass percentage calculated based on 100 kg: SiO.sub.2: 50% to 55.5%, Al.sub.2O.sub.3: 14% to 16.5%, CaO: 19% to 25%, MgO: 0.2% to 0.5%, Na.sub.2O and K.sub.2O: 0.1% to 0.8% in total, CeO.sub.2: 0.1% to 0.4%, Li.sub.2O: 0.1% to 0.5%, Fe.sub.2O.sub.3: 0.05% to 0.45%, TiO.sub.2: 0.1% to 1%, and impurities: the balance.

4. The alkali-free ultrafine glass fiber formula according to claim 1, wherein the components do not comprise B.sub.2O.sub.3 and F.

5. The alkali-free ultrafine glass fiber formula according to claim 2, wherein the components do not comprise B.sub.2O.sub.3 and F.

6. The alkali-free ultrafine glass fiber formula according to claim 3, wherein the components do not comprise B.sub.2O.sub.3 and F.

Description

DETAILED DESCRIPTION OF THE EMBODIMENTS

[0023] The present disclosure will be further described below in conjunction with examples, and the content of the present disclosure is not restricted by the following examples. When a total content of all components is slightly less than or greater than 100%, it can be comprehended that the residual content refers to impurities or a small amount of unanalyzable components. According to the selected components and mass percentages thereof selected in each of Examples 1 to 5 of the present disclosure, corresponding raw materials (including powders of kaolin, pyrophyllite, quartz sand, quicklime, limestone, lithium-containing tailing, cerium oxide, etc.) were weighed and thoroughly mixed in a pneumatic homogenizer to obtain a mixed batch; the mixed batch was delivered to a silo at a furnace head and fed into a tank furnace to undergo high temperature melting to form molten glass; and the molten glass flowed into an operational channel and was drawn into glass fibers by a drawing machine through a platinum-rhodium alloy bushing. Specific mass percentages of raw materials calculated based on 100 Kg were shown in Table 1.

TABLE-US-00001 TABLE 1 Performance test data of Examples 1 to 5 Comparative Example Example Component/% Traditional E glass fiber 1 2 3 4 5 SiO.sub.2 54.1 61 60 60 59.5 58 Al.sub.2O.sub.3 14 13 13.2 13.5 13.1 14.4 CaO 22.2 22.5 23 22.7 23 24 MgO 1.1 1.5 1.5 1.5 1.8 1 Na.sub.2O 0.35 0.5 0.5 0.5 0.55 0.4 K.sub.2O 0.4 0.25 0.25 0.25 0.21 0.2 CeO.sub.2 0 0 0 0.15 0.4 0.4 Li.sub.2O 0 0.25 0.5 0.5 0.5 0.6 Fe.sub.2O.sub.3 0.32 0.31 0.35 0.31 0.31 0.28 TiO.sub.2 0.45 0.42 0.4 0.38 0.42 0.4 B.sub.2O.sub.3 6.35 0 0 0 0 0 F.sub.2 0.55 0 0 0 0 0 Single fiber strength (MPa) 2200 2408 2405 2403 2400 2398 Shaping temperature (° C.) 1175 1290 1287 1282 1282 1263 Softening point (° C.) 860 915 915 911 911 904 Bubble content (/ounce) 8 35 30 10 2 2

[0024] It can be seen from Table 1 that, after CeO.sub.2 and Li.sub.2O are introduced in the production of ultrafine glass fibers, prepared glass fibers show a single fiber strength that is about 9% higher than that of the traditional E glass fibers; compared with ultrafine glass fibers prepared according to a formula including only Li.sub.2O, ultrafine glass fibers prepared according to the formula including both CeO.sub.2 and Li.sub.2O have a lower bubble content and a better fining effect; and due to a low bubble content, fiber breakage does not tend to occur during drawing, and it is more likely to draw ultrafine glass fibers.